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list.lua
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130 lines (106 loc) · 2.23 KB
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---@class java-core.List
local M = {}
---Returns a new list
---@param o? table
---@return java-core.List
function M:new(o)
o = o or {}
setmetatable(o, self)
self.__index = self
return o
end
---Appends a value into to the list
---@param value any
function M:push(value)
table.insert(self, value)
end
---Finds the matching value in a list
---@param finder fun(value: any): boolean
---@return any
function M:find(finder)
for _, value in ipairs(self) do
if finder(value) then
return value
end
end
return nil
end
---Returns a list of mapped values
---@param mapper fun(value: any, index: number): any
---@return java-core.List
function M:map(mapper)
local mapped = M:new()
for i, v in ipairs(self) do
mapped:push(mapper(v, i))
end
return mapped
end
---Flatten a list
---@return java-core.List
function M:flatten()
local flatten = M:new()
for _, v1 in ipairs(self) do
for _, v2 in ipairs(v1) do
flatten:push(v2)
end
end
return flatten
end
---Merge a given list values to current list
---@param list any[]
---@return java-core.List
function M:concat(list)
local new_list = M:new()
for _, v in ipairs(self) do
new_list:push(v)
end
for _, v in ipairs(list) do
new_list:push(v)
end
return new_list
end
function M:includes(value)
for _, v in ipairs(self) do
if v == value then
return true
end
end
return false
end
---Join list items to a string
---@param separator string
---@return string
function M:join(separator)
return table.concat(self, separator)
end
---Calls the given callback for each element
---@param callback fun(value: any, index: integer)
function M:for_each(callback)
for i, v in ipairs(self) do
callback(v, i)
end
end
---Returns true if every element in the list passes the validation
---@param validator fun(value: any, index: integer): boolean
---@return boolean
function M:every(validator)
for i, v in ipairs(self) do
if not validator(v, i) then
return false
end
end
return true
end
---Returns a filtered list
---@param filter fun(value: any, index: integer): boolean
---@return java-core.List
function M:filter(filter)
local new_list = M:new()
self:for_each(function(value, index)
if filter(value, index) then
new_list:push(value)
end
end)
return new_list
end
return M